Surf these sites: American Helicopter Museum and Education Center -- A Museum dedicated to the preservation and display of historic rotorcraft. Located near Philadelphia, Pa. Helicopter Aerodynamics -- College Park press offers classic text by Alfred Gessow and Gary C. Myers Jr. Republished nearly half a century after first print. Helicopter History Site -- The Helicopter History site traces the evolution of rotary wing aircraft back to Leonardo Da Vinci Helicopters and Autogiros 1939 to 1945 -- Aviation history in the WWW: Index of arcraft by category and time period. Igor I. Sikorsky Historical Archives, Inc. -- Dedicated to acquiring, preserving and protecting the historical materials that chronicle the aviation careers of Igor Sikorsky, the companies he founded and the accomplishments of its employees. Collection dates from the latter part of the nineteenth century to the present.
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